linux-kernel - Re: [PATCH v2 6/6] MIPS: cm: Probe GCR address from DeviceTree

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Message-Id: <b4d57581-bad7-4f6f-8d6f-733f1a5d33ba@app.fastmail.com>
Date: Tue, 10 Sep 2024 21:48:10 +0100
From: "Jiaxun Yang" <jiaxun.yang@...goat.com>
To: "Serge Semin" <fancer.lancer@...il.com>
Cc: "Thomas Bogendoerfer" <tsbogend@...ha.franken.de>,
 "paulburton@...nel.org" <paulburton@...nel.org>,
 "linux-mips@...r.kernel.org" <linux-mips@...r.kernel.org>,
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v2 6/6] MIPS: cm: Probe GCR address from DeviceTree



在2024年9月10日九月 下午9:07，Serge Semin写道：
[...]
> Both MIPS P5600 and P6600 databooks define the GCR_BASE field as
> optionally R/W:
>
> GCR_BASE 31:15 This field sets the base address of the 32KB          R or R/W
>                GCR block of the P5600 MPS.                           (IP Config-
>                This register has a fixed value after reset if         uration)
>                configured as Read-Only (an IP Configuration Option).
>

Thanks for the pointer, I traced code history and it seems like MIPS decided
to not expose this functionality at some point, but documents were not updated.

Maybe I should add a read back check here.

Thanks
-- 
- Jiaxun